The Red-winged Blackbird (Agelaius phoeniceus) is a passerine bird of the family Icteridae found in most of North and much of Central America. It breeds from Alaska and Newfoundland south to Florida, the Gulf of Mexico, Mexico and Guatemala, with isolated populations in western El Salvador, northwestern Honduras and northwestern Costa Rica. It may winter as far north as Pennsylvania and British Columbia, but northern populations are generally migratory, moving south to Mexico and the southern United States. The Red-winged Blackbird is sexually dimorphic; the male is all black with a red shoulder and yellow wing bar, while the female is a nondescript dark brown. Seeds and insects make up the bulk of the Red-winged Blackbird's diet.
The Red-winged Blackbird is one of 11 species in the genus Agelaius and is included in the family Icteridae, which is made up of passerine birds found in North and South America. The Red-winged Blackbird was one of the many species originally described by Linnaeus in his 18th century work, Systema Naturae. The genus name of the Red-winged Blackbird, Agelaius, is Latin derived from the Ancient Greek, agelaios, meaning "belonging to a flock". The species name, phoeniceus, is from the Latin word meaning "deep red".
Rear view of A. p. gubernator, the "Bicolored Blackbird", where the lack of a yellow band can be seen.There are a number of subspecies, some of doubtful status, but the 'Bicolored Blackbird' A. p. gubernator of California and central Mexico is distinctive. The male lacks the yellow wing patch of the nominate race, and the female is much darker than the female nominate. The taxonomy of this form is little understood, with the relationships between the two isolated Bicolored populations, and between these and Red-winged still unclear. Despite the similar names, the Red-winged Blackbird is not related to the European Redwing or the Old World Common Blackbird, which are thrushes (Turdidae).
FemaleThe common name for the Red-winged Blackbird is taken from the mainly black adult male's distinctive red shoulder patches, or "epaulets", which are visible when the bird is flying or displaying. At rest, the male also shows a pale yellow wingbar. The female is blackish-brown and paler below. The female is considerably smaller than the male, at 17-18 cm (7 in) length and 36 g (1.2 oz) weight, against his 22-24 cm (9.5 in) and 64 g (2.2 oz).
Young birds resemble the female, but are paler below and have buff feather fringes. Both sexes have a sharply pointed bill. The tail is of medium length and is rounded. The eyes, bill, and feet are all black.
Distribution and habitat
The range of the Red-winged Blackbird stretches from southern Alaska to the Yucatan peninsula in the south, and from the western coast of California and Canada to the east coast of the continent. Red-winged Blackbirds in the northern reaches of the range are migratory, spending winters in the southern United States and Central America. Migration begins in September or October, but occasionally as early as August. In western and middle America, populations are generally non-migratory.
When migrating, the Red-winged Blackbird travels in single-sex flocks. The males usually arrive a few days before the females; once they have reached the location where they plan to breed, the males stake out territories by singing. They defend their territory aggressively, both against other male Red-winged Blackbirds and against creatures they perceive as threatening, including crows, Ospreys, hawks, and even humans.
The Red-winged Blackbird inhabits open grassy areas. It generally prefers wetlands, and inhabits both freshwater and saltwater marshes. It is also found in dry upland areas, where it such inhabits meadows, prairies, and old fields.
Backlit flockThe Red-Winged Blackbird can be very aggressive while defending its territory. It will attack much larger birds, such as crows, ravens, magpies, hawks, and osprey if they enter. They have even been known to attack humans who encroach upon their territories.
The call of the Red-winged Blackbird is a throaty check and a high slurred whistle, terrr-eeee. The male's song is a scratchy oak-a-lee, accompanied with a display of his red shoulder patches.
When the breeding season is over, Red-winged Blackbirds gather in huge flocks, sometimes numbering in the millions.
The Red-winged Blackbird is omnivorous. It feeds primarily on plant materials, including seeds from weeds and waste grain such as corn and rice, but about a quarter of its diet consists of insects and other small animals, and considerably more so during breeding season. It prefers insects, such as dragonflies, damselflies, butterflies, moths, and flies, but also consumes snails, frogs, eggs, carrion, worms, spiders, mollusks. The Red-winged Blackbird forages for insects by picking them from plants, or by catching them in flight. In season, it eats blueberries, blackberries, and other fruit. These birds can be lured to backyard bird feeders by bread and seed mixtures and suet. In late summer and in autumn, the Red-winged Blackbird will feed in open fields, mixed with grackles, cowbirds, and starlings in flocks which can number in the thousands.
The Red-winged Blackbird nests in loose colonies. The nest is built in cattails, rushes, grasses, sedge, or in alder or willow bushes. The nest is constructed entirely by the female over the course of three to six days. It is a basket of grasses, sedge, and mosses, lined with mud, and bound to surrounding grasses, or branches. It is located 7.6 cm (3 in) to 4.3 m (14 ft) above water.
A clutch comprises three or four, rarely five, eggs. Eggs are oval, smooth and slightly glossy, and measure 24.8 x 17.55 mm (1 x .7 in). They are pale bluish green, marked with brown, purple, and/or black, with most markings around the larger end of the egg. These are incubated by the female alone, and hatch in 11 to 12 days. Red-winged Blackbirds are hatched blind and naked, but are ready to leave the nest 11-14 days after hatching.
Red-winged Blackbirds are polygynous, with territorial males defending up to 10 females. However, females frequently copulate with males other than their social mate and often lay clutches of mixed paternity. Pairs raise two or three clutches per season, in a new nest for each clutch.
Predation of eggs and nestlings is quite common. Some nest predators include other birds to as small as marsh wrens, snakes, american mink and the raccoon. The Red-winged Blackbird is occasionally a victim of brood parasites, particularly Brown-headed Cowbirds. Since nest predation is common several adaptations have evolved in this species. Group nesting is one such trait which reduces the risk of individual predation by increasing the number of alert parents. Nesting over water reduces the likelihood of predation as do alarm calls. Nests, in particular, offer a strategic advantage over predators in that they are often well concealed in thick, waterside reeds and positioned at a height of one to two meters. Males often act as sentinels, employing a variety of calls to denote the kind and severity of danger. Mobbing, especially by males, is also used to scare off unwanted predators, although mobbing often targets large animals and man-made devices by mistake. The brownish coloration of the female may also serve as an anti-predator trait in that it may provide camouflage for her and her nest (while she is incubating). Owls and diurnal raptors both are regular predators of adults.
Relationship with Humans
In some parts of the United States, they are considered to be pests because these flocks can consume large amounts of cultivated grain or rice. This bird's numbers are declining due to habitat loss and the use of poison to prevent the loss of crops.
As with the English name of for this bird, the Indigenous languages of the bird's range also describe this bird by its physical characteristics. In the Anishinaabe languages, an Indigenous language group spoken throughout much of the bird's Northeastern range, this bird's name is diverse. In the Oji-Cree language, the northern-most of the Anishinaabe languages, it called jachakanoob, while the Ojibwa language spoken in Northwestern Ontario and into Manitoba ranging immediately south of the Anishinini language's range, the bird is called jachakanoo; both languages associate the Red-winged Blackbird as a type of a junco. However, in vast majority of the other Ojibwa language dialects, the bird is called memiskondinimaanganeshiinh, literally meaning "a bird with a very red damn-little shoulder-blade." However, in the Odawa language, an Anishinaabe language in Southwestern Ontario and in Michigan, the bird is instead called either as memeskoniinisi ("bird with a red [patch on its wing]") or as memiskonigwiigaans ("[bird with a] wing of small and very red [patch]").
Heading into the Great Plains, the Lakota language, another indigenous language spoken through out much of the bird's Northeastern range, the bird is called wabloša ("wings of red"). Its songs are described in Lakota as tōke, mat'ā nī ("oh! that I might die"), as nakun miyē ("...and me"), as miš eyā ("me too!"), and as cap'cehlī ("a beaver's running sore").
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